Lyawon wrote on 2021-03-14, 15:16:
May I ask for which reason you use additional ISA IDE interface card instead of stock IDE at main board?
Sure, no problem.🙂 My Tower AT is a model 220 and has no on-board IDE apparently.
Originally, it came with a WD1003 compatible MFM/RLL controller card for ST-506/ST-412 HDDs.
If memory serves, the chip on the card was a WD1006..
Since the PSU was broken, I decided to fix it and keep the power usage low (use flash instead of real HDD).
Edit : Another option was to use a sound card's IDE connector..
Many SB Pro clones (ES688F etc) and my old SB 16 (CT1740) has one, too.
However, I decided against it in case of the AT 220 because I wanted to use a real SB 2.0 with CMS chips in at least one of my PCs.
Because, the analogue mixing circuit between the original first gen SBs differ from SB Pro and later:
PCM audio and FM have differences in volume.
FM and PCM Volume Balance of SB Cards
Of course that's a non issue with a little bit tinkering.
The SB16 has a mixer that can be configured.
And the clones could be modified, if their chips have dedicated output lins for PCM/FM.
Just insert an appropriate resistor to make one of them a bit quiter. 😉
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